Resilient tire.



Patented Dec.v|6, |902. Y J. P. LE GRAND N. CHENEAU. f

RESILIENT TIRE.

(Application md Jim. 15, 1902.)

2 Sheets-Sheet |.f Y

`(Ilo Model.)

Patented Dec. i6, 1902. J. P. LE GRAND & N. CHENEAU.

BESILIENT TIRE. (Application led Jan. 15, 1902.),

2,Sheets-$heet 2.

(No Model.)

g ML/.www WvM/d /gyf nanars Pfr UNITED STATES ATENT Prion.

JEAN PAUL LE GRAND AND NARCISSE CHENEAU, OF LEVALLOIS-PERRET, FRANCE.

RESILIENT TIRE.

SPECIFICATION forming part of Letters Patent No. 716,066, dated December 16, 1902.

Application led January 15,1902. Serial No. 89,813. (No model.)

T0 all whom it may concern:

Be it known that we, JEAN PAUL LE GRAND and NARcIssE CHENEAU, manufacturers, citizens of the Republic of France, residing at 9 Rue Danton, Levallois-Perret, Seine, France, have invented certain new and useful Improvements in .Resilient Tires, of which the following is a speciiication.

Our present invention has relation to an improved form of distending means for elastic tires which may be used either in connection with the pneumatic tubes commonly employed, in which case they serve to protect the tire from damage when not inflated, or it may be employed alone with a proper exte* rior envelop and without the air-tube.

It has been hitherto proposed to employ chaplets of more or less elastic masses strung on a cord or the like within the outer envelop for the purposes above indicated; and our present invention has relation to improvements in this class of device whereby the masses in question are preventedfrom slipping along the cord and being jammed together under the influence of a sudden stop caused by severe application of the brake or otherwise.

One important branch of this invention has relation to a novel means whereby the degree of ,resilience of the separate masses employed may be regulated at will without having recourse to changes in the composition of the rubber, which latter expedient necessarily causes deterioration in the quality of the material.

One form of our invention is illustrated in the accompanying drawings, wherein- Figures l to 3 are longitudinal sections of a portion of hollow tires provided with differ` ent forms of our improvement, and Fig. 4 is a perspective view of a portion of one form of hollow tire provided with our improved chaplet.

In Fig. 1 the outer tube is shown at l, and at 2 are shown hollow balls, of rubber or similar elastic material. These balls, together with the intermediate spools 3, are strung upon a central cord 4, which may be of any desired construction. In our claims this element is claimed as a cord g but it is to be understood that this term covers any of the well-known equivalents for cord' or string. Each intermediate body 3 is fixed in place upon the central cord by a pin or bolt 5.

These bodies are made of wood or other relatively1 non-elastic and hard material, and they serve to prevent the balls 2 from coming in contact 'or slipping along the chaplet. Within each ball 2 is a hard spool 6 with a concave outer surface, also strung upon the central 6o cord. The object of this core 6 is to limit the degree of compression of the ball 2 when under weight. In operation the balls will first collapse and will then be compressed upon their cores. The relative degree of collapse and compression can be easily controlled loy the form and relative size of each core.

In the preferred form (shown in Fig. l) the spools 3 have necks 7, which enter openings at the two sides of each ball 2, serving to support the edges of said openings, as well as to provide an abutment for each ball to prevent its slipping.

In Fig. 2 the core within the ball 2 is shown at 8 as being cylindrical in shape. This is to illustrate the variety of forms which may be given to this core without departing from our invention.

The form shown in Fig. 3 is particularly useful where the tire is to be applied to wheels designed to carry heavy loads. Here each ball 2 is replaced by an annular mass 9 of rubber or the like, within which is a core l0, which entirely fills the opening thereof. In order that when the core is in place it may act to compress the rubber 9 and limit its further compression under load, We prefer to make the inner core 10 of a diameter greater than the normal inner diameter of the mass 9 when not surrounding the core.

Fig. 4 shows a portion of one form of outer envelop which may be applied to our improved chaplet; but We are not to be limited to this or any other one form of outer envelop in this connection.

The advantage of our construction is that the intermediate spools or bodies 3, being fixed to the central cord, prevent movement of the balls among themselves under any circumstances and prevent these balls or other bodies from piling and jamming the one on the other when a sudden stop occurs.

IOO

What We claim is l having ya diameter greater than the normal l. A hollow tire containing a chaplet com diameter of the perforation in said elastic posed of a central cord, elastic bodies strung mass, substantially as and for the purpose r 5 thereon at intervals, hard bodies also strung described. 5 thereon between successive elastic bodies to In witness whereof We have hereunto signed keep the latter apart and means for fixing our names, this 14th day of November, 1901, said hard bodies in place on said cord, subin the presence of two subscribing witnesses.

stantially as and for the purposes described. JEAN PAUL LE GRAND. 2. A hollow tire containing a ehaplet com- NARCISSE OHENEAU. lo prising elastic bodies consisting of a perfo- Witnesses:

' rated mass of elastic material and a core of PAUL TOURNOL,

hard material surrounded thereby, said core WALTHER HARTMANN. 

